Trig - Unit Circle

Front

What is the definition of the unit circle?

Back

The unit circle is a circle with a radius of 1 centered at the origin (0,0) in the coordinate plane.

Front

What does the sine function represent in the unit circle?

Back

The sine function represents the y-coordinate of a point on the unit circle.

Front

What does the cosine function represent in the unit circle?

Back

The cosine function represents the x-coordinate of a point on the unit circle.

Front

What is the value of sin(π/2)?

Back

1

Front

What is the value of cos(0)?

Back

1

Front

What is the value of tan(π/4)?

Back

1

Front

What are the coordinates of the point at 3π/2 on the unit circle?

Back

(0, -1)

Front

What is the value of sin(7π/4)?

Back

-√2/2

Front

What is the value of cos(5π/6)?

Back

-√3/2

Front

What is the value of tan(5π/4)?

Back

1